patching Exists expression for intersystems

Author: daimor

django_iris/__init__.py

@@ -0,0 +1,8 @@
+from django.db.models.expressions import Exists
+
+def exists_as_intersystems(self, compiler, connection, template=None, **extra_context):
+    template = "(SELECT COUNT(*) FROM (%(subquery)s))"
+    return self.as_sql(compiler, connection, template, **extra_context)
+
+Exists.as_intersystems = exists_as_intersystems
+